aboutsummaryrefslogtreecommitdiff
path: root/gdb/skip.c
blob: 3308252cb47825906ff9818d66340aa39d579a1a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
/* Skipping uninteresting files and functions while stepping.

   Copyright (C) 2011-2022 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "skip.h"
#include "value.h"
#include "valprint.h"
#include "ui-out.h"
#include "symtab.h"
#include "gdbcmd.h"
#include "command.h"
#include "completer.h"
#include "stack.h"
#include "cli/cli-utils.h"
#include "arch-utils.h"
#include "linespec.h"
#include "objfiles.h"
#include "breakpoint.h" /* for get_sal_arch () */
#include "source.h"
#include "filenames.h"
#include "fnmatch.h"
#include "gdb_regex.h"
#include "gdbsupport/gdb_optional.h"
#include <list>
#include "cli/cli-style.h"
#include "gdbsupport/buildargv.h"

/* True if we want to print debug printouts related to file/function
   skipping. */
static bool debug_skip = false;

class skiplist_entry
{
public:
  /* Create a skiplist_entry object and add it to the chain.  */
  static void add_entry (bool file_is_glob,
			 std::string &&file,
			 bool function_is_regexp,
			 std::string &&function);

  /* Return true if the skip entry has a file or glob-style file
     pattern that matches FUNCTION_SAL.  */
  bool skip_file_p (const symtab_and_line &function_sal) const;

  /* Return true if the skip entry has a function or function regexp
     that matches FUNCTION_NAME.  */
  bool skip_function_p (const char *function_name) const;

  /* Getters.  */
  int number () const { return m_number; };
  bool enabled () const { return m_enabled; };
  bool file_is_glob () const { return m_file_is_glob; }
  const std::string &file () const { return m_file; }
  const std::string &function () const { return m_function; }
  bool function_is_regexp () const { return m_function_is_regexp; }

  /* Setters.  */
  void enable () { m_enabled = true; };
  void disable () { m_enabled = false; };

  /* Disable copy.  */
  skiplist_entry (const skiplist_entry &) = delete;
  void operator= (const skiplist_entry &) = delete;

private:
  /* Key that grants access to the constructor.  */
  struct private_key {};
public:
  /* Public so we can construct with container::emplace_back.  Since
     it requires a private class key, it can't be called from outside.
     Use the add_entry static factory method to construct instead.  */
  skiplist_entry (bool file_is_glob, std::string &&file,
		  bool function_is_regexp, std::string &&function,
		  private_key);

private:
  /* Return true if we're stopped at a file to be skipped.  */
  bool do_skip_file_p (const symtab_and_line &function_sal) const;

  /* Return true if we're stopped at a globbed file to be skipped.  */
  bool do_skip_gfile_p (const symtab_and_line &function_sal) const;

private: /* data */
  int m_number = -1;

  /* True if FILE is a glob-style pattern.
     Otherwise it is the plain file name (possibly with directories).  */
  bool m_file_is_glob;

  /* The name of the file or empty if no name.  */
  std::string m_file;

  /* True if FUNCTION is a regexp.
     Otherwise it is a plain function name (possibly with arguments,
     for C++).  */
  bool m_function_is_regexp;

  /* The name of the function or empty if no name.  */
  std::string m_function;

  /* If this is a function regexp, the compiled form.  */
  gdb::optional<compiled_regex> m_compiled_function_regexp;

  /* Enabled/disabled state.  */
  bool m_enabled = true;
};

static std::list<skiplist_entry> skiplist_entries;
static int highest_skiplist_entry_num = 0;

skiplist_entry::skiplist_entry (bool file_is_glob,
				std::string &&file,
				bool function_is_regexp,
				std::string &&function,
				private_key)
  : m_file_is_glob (file_is_glob),
    m_file (std::move (file)),
    m_function_is_regexp (function_is_regexp),
    m_function (std::move (function))
{
  gdb_assert (!m_file.empty () || !m_function.empty ());

  if (m_file_is_glob)
    gdb_assert (!m_file.empty ());

  if (m_function_is_regexp)
    {
      gdb_assert (!m_function.empty ());
      m_compiled_function_regexp.emplace (m_function.c_str (),
					  REG_NOSUB | REG_EXTENDED,
					  _("regexp"));
    }
}

void
skiplist_entry::add_entry (bool file_is_glob, std::string &&file,
			   bool function_is_regexp, std::string &&function)
{
  skiplist_entries.emplace_back (file_is_glob,
				 std::move (file),
				 function_is_regexp,
				 std::move (function),
				 private_key {});

  /* Incremented after push_back, in case push_back throws.  */
  skiplist_entries.back ().m_number = ++highest_skiplist_entry_num;
}

static void
skip_file_command (const char *arg, int from_tty)
{
  struct symtab *symtab;
  const char *filename = NULL;

  /* If no argument was given, try to default to the last
     displayed codepoint.  */
  if (arg == NULL)
    {
      symtab = get_last_displayed_symtab ();
      if (symtab == NULL)
	error (_("No default file now."));

      /* It is not a typo, symtab_to_filename_for_display would be needlessly
	 ambiguous.  */
      filename = symtab_to_fullname (symtab);
    }
  else
    filename = arg;

  skiplist_entry::add_entry (false, std::string (filename),
			     false, std::string ());

  printf_filtered (_("File %s will be skipped when stepping.\n"), filename);
}

/* Create a skiplist entry for the given function NAME and add it to the
   list.  */

static void
skip_function (const char *name)
{
  skiplist_entry::add_entry (false, std::string (), false, std::string (name));

  printf_filtered (_("Function %s will be skipped when stepping.\n"), name);
}

static void
skip_function_command (const char *arg, int from_tty)
{
  /* Default to the current function if no argument is given.  */
  if (arg == NULL)
    {
      frame_info *fi = get_selected_frame (_("No default function now."));
      struct symbol *sym = get_frame_function (fi);
      const char *name = NULL;

      if (sym != NULL)
	name = sym->print_name ();
      else
	error (_("No function found containing current program point %s."),
	       paddress (get_current_arch (), get_frame_pc (fi)));
      skip_function (name);
      return;
    }

  skip_function (arg);
}

/* Process "skip ..." that does not match "skip file" or "skip function".  */

static void
skip_command (const char *arg, int from_tty)
{
  const char *file = NULL;
  const char *gfile = NULL;
  const char *function = NULL;
  const char *rfunction = NULL;
  int i;

  if (arg == NULL)
    {
      skip_function_command (arg, from_tty);
      return;
    }

  gdb_argv argv (arg);

  for (i = 0; argv[i] != NULL; ++i)
    {
      const char *p = argv[i];
      const char *value = argv[i + 1];

      if (strcmp (p, "-fi") == 0
	  || strcmp (p, "-file") == 0)
	{
	  if (value == NULL)
	    error (_("Missing value for %s option."), p);
	  file = value;
	  ++i;
	}
      else if (strcmp (p, "-gfi") == 0
	       || strcmp (p, "-gfile") == 0)
	{
	  if (value == NULL)
	    error (_("Missing value for %s option."), p);
	  gfile = value;
	  ++i;
	}
      else if (strcmp (p, "-fu") == 0
	       || strcmp (p, "-function") == 0)
	{
	  if (value == NULL)
	    error (_("Missing value for %s option."), p);
	  function = value;
	  ++i;
	}
      else if (strcmp (p, "-rfu") == 0
	       || strcmp (p, "-rfunction") == 0)
	{
	  if (value == NULL)
	    error (_("Missing value for %s option."), p);
	  rfunction = value;
	  ++i;
	}
      else if (*p == '-')
	error (_("Invalid skip option: %s"), p);
      else if (i == 0)
	{
	  /* Assume the user entered "skip FUNCTION-NAME".
	     FUNCTION-NAME may be `foo (int)', and therefore we pass the
	     complete original arg to skip_function command as if the user
	     typed "skip function arg".  */
	  skip_function_command (arg, from_tty);
	  return;
	}
      else
	error (_("Invalid argument: %s"), p);
    }

  if (file != NULL && gfile != NULL)
    error (_("Cannot specify both -file and -gfile."));

  if (function != NULL && rfunction != NULL)
    error (_("Cannot specify both -function and -rfunction."));

  /* This shouldn't happen as "skip" by itself gets punted to
     skip_function_command.  */
  gdb_assert (file != NULL || gfile != NULL
	      || function != NULL || rfunction != NULL);

  std::string entry_file;
  if (file != NULL)
    entry_file = file;
  else if (gfile != NULL)
    entry_file = gfile;

  std::string entry_function;
  if (function != NULL)
    entry_function = function;
  else if (rfunction != NULL)
    entry_function = rfunction;

  skiplist_entry::add_entry (gfile != NULL, std::move (entry_file),
			     rfunction != NULL, std::move (entry_function));

  /* I18N concerns drive some of the choices here (we can't piece together
     the output too much).  OTOH we want to keep this simple.  Therefore the
     only polish we add to the output is to append "(s)" to "File" or
     "Function" if they're a glob/regexp.  */
  {
    const char *file_to_print = file != NULL ? file : gfile;
    const char *function_to_print = function != NULL ? function : rfunction;
    const char *file_text = gfile != NULL ? _("File(s)") : _("File");
    const char *lower_file_text = gfile != NULL ? _("file(s)") : _("file");
    const char *function_text
      = rfunction != NULL ? _("Function(s)") : _("Function");

    if (function_to_print == NULL)
      {
	printf_filtered (_("%s %s will be skipped when stepping.\n"),
			 file_text, file_to_print);
      }
    else if (file_to_print == NULL)
      {
	printf_filtered (_("%s %s will be skipped when stepping.\n"),
			 function_text, function_to_print);
      }
    else
      {
	printf_filtered (_("%s %s in %s %s will be skipped"
			   " when stepping.\n"),
			 function_text, function_to_print,
			 lower_file_text, file_to_print);
      }
  }
}

static void
info_skip_command (const char *arg, int from_tty)
{
  int num_printable_entries = 0;
  struct value_print_options opts;

  get_user_print_options (&opts);

  /* Count the number of rows in the table and see if we need space for a
     64-bit address anywhere.  */
  for (const skiplist_entry &e : skiplist_entries)
    if (arg == NULL || number_is_in_list (arg, e.number ()))
      num_printable_entries++;

  if (num_printable_entries == 0)
    {
      if (arg == NULL)
	current_uiout->message (_("Not skipping any files or functions.\n"));
      else
	current_uiout->message (
	  _("No skiplist entries found with number %s.\n"), arg);

      return;
    }

  ui_out_emit_table table_emitter (current_uiout, 6, num_printable_entries,
				   "SkiplistTable");

  current_uiout->table_header (5, ui_left, "number", "Num");   /* 1 */
  current_uiout->table_header (3, ui_left, "enabled", "Enb");  /* 2 */
  current_uiout->table_header (4, ui_right, "regexp", "Glob"); /* 3 */
  current_uiout->table_header (20, ui_left, "file", "File");   /* 4 */
  current_uiout->table_header (2, ui_right, "regexp", "RE");   /* 5 */
  current_uiout->table_header (40, ui_noalign, "function", "Function"); /* 6 */
  current_uiout->table_body ();

  for (const skiplist_entry &e : skiplist_entries)
    {
      QUIT;
      if (arg != NULL && !number_is_in_list (arg, e.number ()))
	continue;

      ui_out_emit_tuple tuple_emitter (current_uiout, "blklst-entry");
      current_uiout->field_signed ("number", e.number ()); /* 1 */

      if (e.enabled ())
	current_uiout->field_string ("enabled", "y"); /* 2 */
      else
	current_uiout->field_string ("enabled", "n"); /* 2 */

      if (e.file_is_glob ())
	current_uiout->field_string ("regexp", "y"); /* 3 */
      else
	current_uiout->field_string ("regexp", "n"); /* 3 */

      current_uiout->field_string ("file",
				   e.file ().empty () ? "<none>"
				   : e.file ().c_str (),
				   e.file ().empty ()
				   ? metadata_style.style ()
				   : file_name_style.style ()); /* 4 */
      if (e.function_is_regexp ())
	current_uiout->field_string ("regexp", "y"); /* 5 */
      else
	current_uiout->field_string ("regexp", "n"); /* 5 */

      current_uiout->field_string ("function",
				   e.function ().empty () ? "<none>"
				   : e.function ().c_str (),
				   e.function ().empty ()
				   ? metadata_style.style ()
				   : function_name_style.style ()); /* 6 */

      current_uiout->text ("\n");
    }
}

static void
skip_enable_command (const char *arg, int from_tty)
{
  bool found = false;

  for (skiplist_entry &e : skiplist_entries)
    if (arg == NULL || number_is_in_list (arg, e.number ()))
      {
	e.enable ();
	found = true;
      }

  if (!found)
    error (_("No skiplist entries found with number %s."), arg);
}

static void
skip_disable_command (const char *arg, int from_tty)
{
  bool found = false;

  for (skiplist_entry &e : skiplist_entries)
    if (arg == NULL || number_is_in_list (arg, e.number ()))
      {
	e.disable ();
	found = true;
      }

  if (!found)
    error (_("No skiplist entries found with number %s."), arg);
}

static void
skip_delete_command (const char *arg, int from_tty)
{
  bool found = false;

  for (auto it = skiplist_entries.begin (),
	 end = skiplist_entries.end ();
       it != end;)
    {
      const skiplist_entry &e = *it;

      if (arg == NULL || number_is_in_list (arg, e.number ()))
	{
	  it = skiplist_entries.erase (it);
	  found = true;
	}
      else
	++it;
    }

  if (!found)
    error (_("No skiplist entries found with number %s."), arg);
}

bool
skiplist_entry::do_skip_file_p (const symtab_and_line &function_sal) const
{
  if (debug_skip)
    fprintf_unfiltered (gdb_stdlog,
			"skip: checking if file %s matches non-glob %s...",
			function_sal.symtab->filename, m_file.c_str ());

  bool result;

  /* Check first sole SYMTAB->FILENAME.  It may not be a substring of
     symtab_to_fullname as it may contain "./" etc.  */
  if (compare_filenames_for_search (function_sal.symtab->filename,
				    m_file.c_str ()))
    result = true;

  /* Before we invoke realpath, which can get expensive when many
     files are involved, do a quick comparison of the basenames.  */
  else if (!basenames_may_differ
	   && filename_cmp (lbasename (function_sal.symtab->filename),
			    lbasename (m_file.c_str ())) != 0)
    result = false;
  else
    {
      /* Note: symtab_to_fullname caches its result, thus we don't have to.  */
      const char *fullname = symtab_to_fullname (function_sal.symtab);

      result = compare_filenames_for_search (fullname, m_file.c_str ());
    }

  if (debug_skip)
    fprintf_unfiltered (gdb_stdlog, result ? "yes.\n" : "no.\n");

  return result;
}

bool
skiplist_entry::do_skip_gfile_p (const symtab_and_line &function_sal) const
{
  if (debug_skip)
    fprintf_unfiltered (gdb_stdlog,
			"skip: checking if file %s matches glob %s...",
			function_sal.symtab->filename, m_file.c_str ());

  bool result;

  /* Check first sole SYMTAB->FILENAME.  It may not be a substring of
     symtab_to_fullname as it may contain "./" etc.  */
  if (gdb_filename_fnmatch (m_file.c_str (), function_sal.symtab->filename,
			    FNM_FILE_NAME | FNM_NOESCAPE) == 0)
    result = true;

  /* Before we invoke symtab_to_fullname, which is expensive, do a quick
     comparison of the basenames.
     Note that we assume that lbasename works with glob-style patterns.
     If the basename of the glob pattern is something like "*.c" then this
     isn't much of a win.  Oh well.  */
  else if (!basenames_may_differ
      && gdb_filename_fnmatch (lbasename (m_file.c_str ()),
			       lbasename (function_sal.symtab->filename),
			       FNM_FILE_NAME | FNM_NOESCAPE) != 0)
    result = false;
  else
    {
      /* Note: symtab_to_fullname caches its result, thus we don't have to.  */
      const char *fullname = symtab_to_fullname (function_sal.symtab);

      result = compare_glob_filenames_for_search (fullname, m_file.c_str ());
    }

  if (debug_skip)
    fprintf_unfiltered (gdb_stdlog, result ? "yes.\n" : "no.\n");

  return result;
}

bool
skiplist_entry::skip_file_p (const symtab_and_line &function_sal) const
{
  if (m_file.empty ())
    return false;

  if (function_sal.symtab == NULL)
    return false;

  if (m_file_is_glob)
    return do_skip_gfile_p (function_sal);
  else
    return do_skip_file_p (function_sal);
}

bool
skiplist_entry::skip_function_p (const char *function_name) const
{
  if (m_function.empty ())
    return false;

  bool result;

  if (m_function_is_regexp)
    {
      if (debug_skip)
	fprintf_unfiltered (gdb_stdlog,
			    "skip: checking if function %s matches regex %s...",
			    function_name, m_function.c_str ());

      gdb_assert (m_compiled_function_regexp);
      result
	= (m_compiled_function_regexp->exec (function_name, 0, NULL, 0) == 0);
    }
  else
    {
      if (debug_skip)
	fprintf_unfiltered (gdb_stdlog,
			    ("skip: checking if function %s matches non-regex "
			     "%s..."),
			    function_name, m_function.c_str ());
      result = (strcmp_iw (function_name, m_function.c_str ()) == 0);
    }

  if (debug_skip)
    fprintf_unfiltered (gdb_stdlog, result ? "yes.\n" : "no.\n");

  return result;
}

/* See skip.h.  */

bool
function_name_is_marked_for_skip (const char *function_name,
				  const symtab_and_line &function_sal)
{
  if (function_name == NULL)
    return false;

  for (const skiplist_entry &e : skiplist_entries)
    {
      if (!e.enabled ())
	continue;

      bool skip_by_file = e.skip_file_p (function_sal);
      bool skip_by_function = e.skip_function_p (function_name);

      /* If both file and function must match, make sure we don't errantly
	 exit if only one of them match.  */
      if (!e.file ().empty () && !e.function ().empty ())
	{
	  if (skip_by_file && skip_by_function)
	    return true;
	}
      /* Only one of file/function is specified.  */
      else if (skip_by_file || skip_by_function)
	return true;
    }

  return false;
}

/* Completer for skip numbers.  */

static void
complete_skip_number (cmd_list_element *cmd,
		      completion_tracker &completer,
		      const char *text, const char *word)
{
  size_t word_len = strlen (word);

  for (const skiplist_entry &entry : skiplist_entries)
    {
      gdb::unique_xmalloc_ptr<char> name = xstrprintf ("%d", entry.number ());
      if (strncmp (word, name.get (), word_len) == 0)
	completer.add_completion (std::move (name));
    }
}

void _initialize_step_skip ();
void
_initialize_step_skip ()
{
  static struct cmd_list_element *skiplist = NULL;
  struct cmd_list_element *c;

  add_prefix_cmd ("skip", class_breakpoint, skip_command, _("\
Ignore a function while stepping.\n\
\n\
Usage: skip [FUNCTION-NAME]\n\
       skip [FILE-SPEC] [FUNCTION-SPEC]\n\
If no arguments are given, ignore the current function.\n\
\n\
FILE-SPEC is one of:\n\
       -fi|-file FILE-NAME\n\
       -gfi|-gfile GLOB-FILE-PATTERN\n\
FUNCTION-SPEC is one of:\n\
       -fu|-function FUNCTION-NAME\n\
       -rfu|-rfunction FUNCTION-NAME-REGULAR-EXPRESSION"),
		  &skiplist, 1, &cmdlist);

  c = add_cmd ("file", class_breakpoint, skip_file_command, _("\
Ignore a file while stepping.\n\
Usage: skip file [FILE-NAME]\n\
If no filename is given, ignore the current file."),
	       &skiplist);
  set_cmd_completer (c, filename_completer);

  c = add_cmd ("function", class_breakpoint, skip_function_command, _("\
Ignore a function while stepping.\n\
Usage: skip function [FUNCTION-NAME]\n\
If no function name is given, skip the current function."),
	       &skiplist);
  set_cmd_completer (c, location_completer);

  c = add_cmd ("enable", class_breakpoint, skip_enable_command, _("\
Enable skip entries.\n\
Usage: skip enable [NUMBER | RANGE]...\n\
You can specify numbers (e.g. \"skip enable 1 3\"),\n\
ranges (e.g. \"skip enable 4-8\"), or both (e.g. \"skip enable 1 3 4-8\").\n\n\
If you don't specify any numbers or ranges, we'll enable all skip entries."),
	       &skiplist);
  set_cmd_completer (c, complete_skip_number);

  c = add_cmd ("disable", class_breakpoint, skip_disable_command, _("\
Disable skip entries.\n\
Usage: skip disable [NUMBER | RANGE]...\n\
You can specify numbers (e.g. \"skip disable 1 3\"),\n\
ranges (e.g. \"skip disable 4-8\"), or both (e.g. \"skip disable 1 3 4-8\").\n\n\
If you don't specify any numbers or ranges, we'll disable all skip entries."),
	       &skiplist);
  set_cmd_completer (c, complete_skip_number);

  c = add_cmd ("delete", class_breakpoint, skip_delete_command, _("\
Delete skip entries.\n\
Usage: skip delete [NUMBER | RANGES]...\n\
You can specify numbers (e.g. \"skip delete 1 3\"),\n\
ranges (e.g. \"skip delete 4-8\"), or both (e.g. \"skip delete 1 3 4-8\").\n\n\
If you don't specify any numbers or ranges, we'll delete all skip entries."),
	       &skiplist);
  set_cmd_completer (c, complete_skip_number);

  add_info ("skip", info_skip_command, _("\
Display the status of skips.\n\
Usage: info skip [NUMBER | RANGES]...\n\
You can specify numbers (e.g. \"info skip 1 3\"), \n\
ranges (e.g. \"info skip 4-8\"), or both (e.g. \"info skip 1 3 4-8\").\n\n\
If you don't specify any numbers or ranges, we'll show all skips."));
  set_cmd_completer (c, complete_skip_number);

  add_setshow_boolean_cmd ("skip", class_maintenance,
			   &debug_skip, _("\
Set whether to print the debug output about skipping files and functions."),
			   _("\
Show whether the debug output about skipping files and functions is printed."),
			   _("\
When non-zero, debug output about skipping files and functions is displayed."),
			   NULL, NULL,
			   &setdebuglist, &showdebuglist);
}